通風系統系統分類

1、按通(tong)(tong)風(feng)動力分類：自然通(tong)(tong)風(feng) 、機械通(tong)(tong)風(feng)；

2、按照通(tong)風服務范圍： 全面通(tong)風 、局(ju)部通(tong)風；

3、按氣流方向分(fen)類(lei)：送（進）、排風（煙）；

4、按通(tong)風目的分類： 一般換氣通(tong)風、熱風供暖、排(pai)毒與除(chu)塵、事(shi)故(gu)通(tong)風、防護式通(tong)風、建筑防排(pai)煙等；

5、按動(dong)(dong)力(li)(li)所處的(de)位置(zhi)分類：動(dong)(dong)力(li)(li)集中式和動(dong)(dong)力(li)(li)分布式。

通風系統系統功能

1、用室(shi)外的(de)(de)新鮮空(kong)氣更新室(shi)內由于(yu)居住(zhu)及生活過程(cheng)而污染了的(de)(de)空(kong)氣，以保(bao)持室(shi)內空(kong)氣的(de)(de)潔凈度達(da)到某(mou)一最低標(biao)準的(de)(de)水平。

2、增加體內散熱及防止由皮膚潮濕引起的不舒適，此類通(tong)(tong)風可稱為熱舒適通(tong)(tong)風。

3、當室內氣溫(wen)(wen)高(gao)于室外的氣溫(wen)(wen)時，使(shi)建筑構件降溫(wen)(wen)，此類通風(feng)名為(wei)建筑的降溫(wen)(wen)通風(feng)。

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通風系統的組成

通(tong)(tong)風(feng)(feng)系統一般由通(tong)(tong)風(feng)(feng)設備、通(tong)(tong)風(feng)(feng)管道(dao)、消(xiao)聲器、風(feng)(feng)機、控(kong)制系統組成。

1、通風設備

實(shi)驗室(shi)(shi)常(chang)用通(tong)(tong)風(feng)(feng)設備主要有(you)排(pai)(pai)(pai)(pai)(pai)毒(du)(du)(du)柜(ju)、原子吸(xi)收罩、萬向(xiang)排(pai)(pai)(pai)(pai)(pai)氣(qi)(qi)罩、桌(zhuo)面式通(tong)(tong)風(feng)(feng)罩等。排(pai)(pai)(pai)(pai)(pai)毒(du)(du)(du)柜(ju)是(shi)安全處(chu)理有(you)害、有(you)毒(du)(du)(du)氣(qi)(qi)體(ti)或蒸(zheng)汽的通(tong)(tong)風(feng)(feng)設備，作用是(shi)用來(lai)捕(bu)捉(zhuo)、密封和(he)轉移污染(ran)物以及有(you)害氣(qi)(qi)體(ti)，防止其逃(tao)逸到實(shi)驗室(shi)(shi)內，這樣通(tong)(tong)過吸(xi)入(ru)(ru)工作區域(yu)的污染(ran)物，使操作者吸(xi)入(ru)(ru)接觸的污染(ran)物最小化。排(pai)(pai)(pai)(pai)(pai)毒(du)(du)(du)柜(ju)內的氣(qi)(qi)流(liu)是(shi)通(tong)(tong)過排(pai)(pai)(pai)(pai)(pai)風(feng)(feng)機將(jiang)實(shi)驗室(shi)(shi)內的空氣(qi)(qi)吸(xi)進排(pai)(pai)(pai)(pai)(pai)毒(du)(du)(du)柜(ju)，將(jiang)排(pai)(pai)(pai)(pai)(pai)毒(du)(du)(du)柜(ju)內污染(ran)的氣(qi)(qi)體(ti)桸釋(shi)并通(tong)(tong)過通(tong)(tong)風(feng)(feng)系統(tong)排(pai)(pai)(pai)(pai)(pai)到戶外(wai)后(hou)，可以達(da)到低濃度擴散。

2、通風管道

對于一(yi)般(ban)的普通(tong)(tong)建筑，若室內(nei)排出的氣(qi)體沒有(you)腐蝕性，通(tong)(tong)風管道可以采(cai)(cai)用(yong)鍍鋅鋼板，對于產生有(you)腐蝕性氣(qi)體的實(shi)驗室，風管應采(cai)(cai)用(yong)耐(nai)腐蝕材料的PVC風管或玻璃鋼風管。在一(yi)般(ban)的實(shi)驗室通(tong)(tong)風工程，室內(nei)大多(duo)采(cai)(cai)用(yong)PVC風管、室外采(cai)(cai)用(yong)玻璃鋼風管。

3、風機

風(feng)(feng)(feng)機主(zhu)要有軸(zhou)流風(feng)(feng)(feng)機、斜流風(feng)(feng)(feng)機、離(li)心風(feng)(feng)(feng)機。軸(zhou)流風(feng)(feng)(feng)機、斜流風(feng)(feng)(feng)機適用(yong)于風(feng)(feng)(feng)壓小、管(guan)(guan)路短的(de)(de)(de)通風(feng)(feng)(feng)系(xi)統(tong)，如(ru)直(zhi)接(jie)排(pai)至窗外(wai)(wai)或墻外(wai)(wai)的(de)(de)(de)通風(feng)(feng)(feng)系(xi)統(tong)，簡(jian)稱(cheng)直(zhi)排(pai)；玻離(li)鋼離(li)心風(feng)(feng)(feng)機適用(yong)于管(guan)(guan)路長(chang)的(de)(de)(de)的(de)(de)(de)通風(feng)(feng)(feng)系(xi)統(tong)，如(ru)通過風(feng)(feng)(feng)管(guan)(guan)井或外(wai)(wai)墻接(jie)管(guan)(guan)排(pai)至屋頂(ding)(ding)，簡(jian)稱(cheng)屋頂(ding)(ding)排(pai)放。風(feng)(feng)(feng)機的(de)(de)(de)材質：一般分為玻璃鋼、PP、PVC等(deng)。風(feng)(feng)(feng)機的(de)(de)(de)型號根據風(feng)(feng)(feng)量和風(feng)(feng)(feng)壓選(xuan)擇。

4、通風控制系統

通風控(kong)(kong)制系統可根據不同(tong)的情況采用不同(tong)的控(kong)(kong)制方式(shi)，如，單臺通風設備定風量(liang)(liang)通風控(kong)(kong)制系統、多臺通風設備變(bian)(bian)頻控(kong)(kong)制系統、多臺通風設備變(bian)(bian)頻+變(bian)(bian)風量(liang)(liang)通風控(kong)(kong)制系統。